LVM and grub

[Mikkel L. Ellertson]

Timothy Murphy wrote:
> I set up an LVM partitioning scheme on one computer,
> with /boot on /dev/sda3 outside LVM .
> But grub could not access / because LVM was not activated.
> This made me wonder:
> 
> 1. Is there any way of asking grub to activate LVM
> (eg run "vchange -a y") before it looks for the / partition?
> 
> 2. Is there any argument one could add to the kernel line
> to the same effect?
> 
> In the end I deleted the LVM, and used ordinary partitions,
> so the question is purely academic.
> 
With /boot on its own partition, Grub does not need to access the 
root partition. This is good because Grub does not understand LVM. 
The thing you have to remember when using a separate /boot partition 
is that the paths that Grub uses do not start with /boot. You would 
use something like:

title Fedora (2.6.23.14-115.fc8)
         root (hd0,2)
         kernel /vmlinuz-2.6.23.14-115.fc8 ro 
root=/dev/VolGroup00/LogVol00 rhgb quiet
         initrd /initrd-2.6.23.14-115.fc8.img

As far as Grub is concerned, your /boot directory is its root 
directory. This is what the root (hd0,2) is telling Grub.

Mikkel
-- 

   Do not meddle in the affairs of dragons,
for thou art crunchy and taste good with Ketchup!

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